package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
public class ReportServiceImpl implements ReportService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;

    @Autowired
    private WorkspaceService workspaceService;


    @Override
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dates = new ArrayList<>();
        for (LocalDate date = begin; !date.isAfter(end); date = date.plusDays(1)) {
            dates.add(date);
        }
        List<Double> turnovers=new ArrayList<>();
        for (LocalDate date : dates) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map=new HashMap<>();
            map.put("begin",beginTime);
            map.put("end",endTime);
            map.put("status", Orders.COMPLETED);
            Double turnover = orderMapper.sumByMap(map);
            turnover=turnover==null?0:turnover;
            turnovers.add(turnover);
        }
        return TurnoverReportVO.builder()
                .dateList(StringUtils.join(dates, ","))
                .turnoverList(StringUtils.join(turnovers, ","))
                .build();
    }

    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dates = new ArrayList<>();
        for (LocalDate date = begin; !date.isAfter(end); date = date.plusDays(1)) {
            dates.add(date);
        }
        List<Integer> newUsers=new ArrayList<>();
        List<Integer> totalUsers=new ArrayList<>();
        for (LocalDate date : dates) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map=new HashMap<>();
            map.put("end",endTime);
            Integer total= userMapper.countByMap(map);
            map.put("begin",beginTime);
            Integer newUser= userMapper.countByMap(map);
            newUsers.add(newUser);
            totalUsers.add(total);
        }
        return UserReportVO
                .builder()
                .dateList(StringUtils.join(dates, ","))
                .newUserList(StringUtils.join(newUsers, ","))
                .totalUserList(StringUtils.join(totalUsers, ","))
                .build();
    }

    @Override
    public OrderReportVO getOrdersStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dates = new ArrayList<>();
        for (LocalDate date = begin; !date.isAfter(end); date = date.plusDays(1)) {
            dates.add(date);
        }
        List<Integer> orderCountList=new ArrayList<>();
        List<Integer> validOrderCountList=new ArrayList<>();
        for(LocalDate date:dates){
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Integer orderCount=getOrderCount(beginTime,endTime,null);
            Integer orderCompletion=getOrderCount(beginTime,endTime,Orders.COMPLETED);
//            Integer completionRate=orderCompletion==0?0:(orderCompletion*100/orderCount);
            orderCountList.add(orderCount);
            validOrderCountList.add(orderCompletion);
        }
        Integer totalOrderCount=orderCountList.stream().reduce(Integer::sum).get();
        Integer totalValidOrderCount=validOrderCountList.stream().reduce(Integer::sum).get();
        Double completionRate=totalValidOrderCount==0?0:(totalValidOrderCount*1.0/totalOrderCount);
        return OrderReportVO
                .builder()
                .dateList(StringUtils.join(dates, ","))
                .orderCountList(StringUtils.join(orderCountList, ","))
                .validOrderCountList(StringUtils.join(validOrderCountList, ","))
                .totalOrderCount(totalOrderCount)
                .validOrderCount(totalValidOrderCount)
                .orderCompletionRate(completionRate)
                .build();
    }
    private Integer getOrderCount(LocalDateTime begin, LocalDateTime end,Integer status) {
        Map map=new HashMap<>();
        map.put("begin",begin);
        map.put("end",end);
        map.put("status",status);
        return orderMapper.countByMap(map);
    }
    @Override
    public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);
        List<GoodsSalesDTO> salesTop10 = orderMapper.getSaleTop10(beginTime, endTime);
        List<String>names=salesTop10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        List<Integer>numbers=salesTop10.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        return SalesTop10ReportVO
                .builder()
                .nameList(StringUtils.join(names, ","))
                .numberList(StringUtils.join(numbers, ","))
                .build();
    }

    @Override
    /**
     * 导出运营数据报表
     * @param response
     */
    public void exportBusinessData(HttpServletResponse response) {
        //1. 查询数据库，获取营业数据---查询最近30天的运营数据
        LocalDate dateBegin = LocalDate.now().minusDays(30);
        LocalDate dateEnd = LocalDate.now().minusDays(1);

        //查询概览数据
        BusinessDataVO businessDataVO = workspaceService.getBusinessData(LocalDateTime.of(dateBegin, LocalTime.MIN), LocalDateTime.of(dateEnd, LocalTime.MAX));

        //2. 通过POI将数据写入到Excel文件中
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");

        try {
            //基于模板文件创建一个新的Excel文件
            XSSFWorkbook excel = new XSSFWorkbook(in);

            //获取表格文件的Sheet页
            XSSFSheet sheet = excel.getSheet("Sheet1");

            //填充数据--时间
            sheet.getRow(1).getCell(1).setCellValue("时间：" + dateBegin + "至" + dateEnd);

            //获得第4行
            XSSFRow row = sheet.getRow(3);
            row.getCell(2).setCellValue(businessDataVO.getTurnover());
            row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessDataVO.getNewUsers());

            //获得第5行
            row = sheet.getRow(4);
            row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
            row.getCell(4).setCellValue(businessDataVO.getUnitPrice());

            //填充明细数据
            for (int i = 0; i < 30; i++) {
                LocalDate date = dateBegin.plusDays(i);
                //查询某一天的营业数据
                BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));

                //获得某一行
                row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());
            }

            //3. 通过输出流将Excel文件下载到客户端浏览器
            ServletOutputStream out = response.getOutputStream();
            excel.write(out);

            //关闭资源
            out.close();
            excel.close();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }
}
